Oil-engine igniter.



G. H. JERNBERG.

OIL ENGINE IGNITER. APPucATxoN FILED MAY s, 191A A fr0/m16 maan .einrif-isf rai-*ENT OFFICE.

GEGRGE JERNBERG, F BYONNE, JERSEY.

ein-ENGINE reni-TER..

To clljwihom' t may concern.'

4Be it known that l, GEORGE at Bayonne, in the county of Hudson and Stated- New Jersey, have invented certain vnew. aid useful Improvements in Gil-Erb enable ot ers gine lgliifiifofwhich the following is a full, clear and exact description, such as will killed in theart to ywhich it appertains to make and use' thev same.

This invention relates tov improvements in ignition systems vand devices for oil engines which may utilize, in normaloperatiointhe heat of compression and localized stored heat of combustion to eii'ect ignitionof the` oil mixture.

The primary object of thefinvention is' to provide simple, positive. yand durable means for effecting electric ignitionot-Qthe combustive mixture in starting vand f`)"i" protectingthe electric ignition elements-from the effects of high temperaturefand"combustion een Adevice applied products in the explosion chamber during normal operation.

other @pagina Manages Wiii be in' part noted hereinafter. in connection with the description ofthe accompanying draw-` ing, which illustrates a typical embodiment of the invention, and in which-f Figure. i isa sectionalviewuof an oil engine cylinder with an improved ignition thereto; and-h1.

Fig. 2 is a detail enlarged view of the ignition plug in an adjusted position. Y

Referring more particularly to the drawing, there is indicatedl anoil engine cylinder l having a piston 2 workin therein' and having a communicatingcom ustion chamber 8 to kwhich the fuel is injected under pressure.

v ln normal ruiming, air. may loe-drawn into the engine crank case, where it is AcompressedV driving out and forced into the cylinder,

the gases oi. the previous explosionr and leav. ing the` cylinder fullof fresh air for the.

nextcompression stroke. -As the piston nears the end of its stroke,'the fuel is forci the combustion chamber 3,.

bly injected into where ignition `takes 'place Jfrom .localized heat and moderate compression, that is about 250 pounds. lt will be noted tha-tthe coni-v bustion chamber is entirelyout'sidethe cyl-V inder, these parts 4l, and that" thev fuel is injected only into the b communicating by a bore chamber, and only at a predetermined p oint spe'ciacation of Leners raient. i

HENRY JERN- BERG, a. citizen of the United States, residing for tight t,

available.y Thereafter,

objection,

Patented Get. S, 1918.

Application led May 3, 1917` Serial No. 166,114.

inthe cycle. The wall 5 of 'the combustion chamber, for the purposes to be described, isalso provided with athreaded opening 6 therethrough, into' which is screwed a collar or vblock 7 designed to be ixedly positioned vtherein and in turn having an internal threaded bore 8. These parts'are adapted but there is also prefieranbly providedv a gasket 9'wedged between the colf lar head and the chamber wall exterior to more eifectually, insure againstl compression losses.

An electric ignition plug 10, of a length greater .than the thickness of the chamber wall, is screwed through the centralbore,

of the vcollar 7 and is constructed and arranged'for relative lengthwise .movement,

whereby its projection into the chamber may' be varied. At its inner, end the plug carries an ignition element 11 in the form of an electricalV resistance,- such' as nickel lirome wire, which becomes incandescent `when connected with an external battery or other suitable current source. In the exemplary construction illustrated, the ignition element 11: is

mixture within the chamber through one or more side openings 12in the threaded plug l wall.

-As indicated, .the plug is designed for movement inward and outward with respect 8() f located in the interior of the vplug 10 and is exposed to the combustion to the chamber wall by screwing the same chamber it wouldbe rapidly attackedthere- To overcomesuch byand rendered useless.

therefore, thepplug 10 is withdrawn after ,start-ing to tance element 11 is the position shown in Fig. .2, where the resi completely sealed from the explosive chamer, g t 'It'willbe noted that the threaded interwarmed andthe normal means oo' position '1) the ignition freely exposed to the mixture l fuel is injected.v

- to cause the fuel mixture to attain a pressure engagement of the plug and collar 7 will provide an interit between these parts, tending in general to prevent an v escape of compression therebetween; but further to insure this result the plug is provided adjacent its outer head with' a beveled portion 13 and at its inner end with a seat 1st having a beveled portion 15 which respectively take into and tightly bear against the beveled walls 16 and -17 of recessesv in the collar. when the plug is ineither extreme position. .It is also of advantage to provide the plug about inner end with an untlireaded exterior 18, so that any combustion deposits thereon will not be screwed into ythe threads of the collar 7 when tlie plug is withdrawn.

As many changes could be made in the above constructionv and many' apparently widely different embodiments of this invention could be made without departing from tlj'e scope thereof: it is intended that all n 'atter contained in the above description or Shown in the accompanying drawing shall be interpreted as illustrativeand not in a limiting sense. l

It is also to be understood that the language used in the following claims is intended to coveil all of the generic and specitic lfeatures of the invention! here-in described and all statements of the scope of the invention` which. as a matter ot language. might be said to fall therebetweeni Having described my invention. what I claim as ii'ew and desire to secure by Letters Patent, is r 1. -In an oil engine,in combination. a cylinder. a combustion chamber communicating therewith, and an electric ignition element constructed and arranged for exposure in said chamber and sealing. therefrom.

2. In an oil engine. inl combination` a cylinder, a. combustion chamber communicating therewith, an electric ignition element constructed aiid^.arranged for-exposure in said chamber and sealing 'therefrom during compression and combustion of the lfuel mixture therein, 'and meansto Vinsure against comression losses aboutsaid'eleiiient in both positions of the latter. 4 .l 3. In an oil engine, in'conibination,.means and temperature whereby` it will spontaneously ignite. and means independent of said first means constructed and arranged for contactwith and sealingkfrom the fuel mixture and adapted. in the former.relation,4 to lieatthe mixtureto ignitionitemperature.

4. In an oil engine. in conibinatioii .'means to cause t-lie'fuelmixture to'attajin a pressure aiid temperature whereby it will spontaneously ignite, and electric means independent of said irst means constructed and arranged for Contact with land'sealing from the fue] mixture and adapted. in the former relation.l to heat the mixture to ignition temperature. 4

an electric element adapted to be positioned 5. In an oil engine. in combination. a combustion chamber: meansl including said chamber to eiect spontaneous ignition ot' the fuel mixture during normal operation: and auxiliary means adapted to be positioned in 4and out of communication with said combustion chamber at will and. in the. former relation, to insure ignition of lthe mixture substantially independently of said first means for starting.

6 In an oil engine. in combination: a combustion chamber; means including said chamber to effect spontaneous ignition of the fuel mixture during normall operation: and

in and out of 'communication with said com bustion chamber at will and. in the former relation. to insure ignition of the mixture substantially independently of said first means for starting.

7. In an oil engine. in combination: a combustion chamber; means including said chamber to etfect spontaneous ignition of the fuel mixture during normal operation: and an electrical resistance element adapted to be positioned in and out of communication with said combustion chamber at will' and, in the former relation. to insure ignition of the 'mixture substantially independ ently of said iirstmeans for starting. and a current source to eiiect incandescence of .said element.

8. The combination with an oil engine Vhaving a combustion chamber and constructed'to effect spontaneous ignition ot the 100 Afuel mixture in'said chamber by compres-- sion and localized heat of previous conduis tion; of means for electrically effecting ignition of the mixture at will: said means includinga member having an electrical heat-v 105 ing element disposed within said combus tion chamber, and means for sealing said element from the combustion products and temperatures in said chamber during succeeding combustion by spontaneous ignition. 110 y. .9. .In an oil engine, in combination. a combustion chamber having a threaded .opening in one wall,a collar iixedly lseated in said opening and provided with a central threaded bore, a plug threaded through said lcollar and mounted for movement relative to said chamber, said plug having at its inner end ali-electrical resistance element adapted Jfor incandescence when connected in an electricv circuit and said plug and collar being constructed and arranged'in a manner whereby said element-is movable for exposure within said chamber -and sealing within said collar. and means to seal said collar and plug against chamber lcompression loss tlierebetween in bothl relative positions of said ele nient.-

10; The herein described method of start effecting continued ignition spontaneously by compression of the mixture and stored heat of previous combustion.

11. The method of starting and running oil engines, whiehincludes electrically heating the fuel mixture to ignition temperature.

when the engine is relatively cold and thereafter proteeting the electrical heating means from the products and temperatures of subsequent combustion vvhile eiecting Continued ignition spontaneously by compres- Sion of the mixture and yheat of' previous combustion.

l2. In an oil engine, 'in combination, a combustion chamber, an electrical ignition means thereforincluding a plug threaded through a Wall of said chamber and having an ignition element adapted for exposure Within said chamber or sealing therefrom by movement of said plug.

13. In an oil engine, in Combinationr ay combustion chamber7 and electrical ignition means therefor including a plug threaded through a wall of said `tliamber and having an ignition element adapted for exposure Within said chamber or sealing therefrom at will by movement oi said plug,-said plug being Constructed and arranged to prevent Contact of the exposable portion thereof with the threads of said chamber Wall when said element is sealed from said chamberv n testimony whereof aiiix my signature7 35 in the presence of two witnesses.

G. H. JERNBERG. "Witnesses H. C. Melina,

THOMAS DRENNN. 

